null_percentage = df.select([(F.count(F.when(F.col(c).isNull(), c))/total_rows).alias(c) for c in df.columns]) null_percentage.show() cols_to_drop = [col for col in null_percentage.columns if null_percentage.first()[col] > threshold ] # Since NULL values in the Age Column...
How to build and evaluate a Decision Tree model for classification using PySpark's MLlib library. Decision Trees are widely used for solving classification problems due to their simplicity, interpretability, and ease of use
# Drop null values df.dropna(axis=0, inplace=True) # filter rows with percentage > 55 output = df[df.Percentage > 55] output As you can see in the table above, the indexing of rows has changed. Initially it was 0,1,2… but now it has changed to 0,1,5. In such cases, you...
ri.drop('county_name',axis='columns',inplace=True) .dropna()Method The.dropna()method is a great way to drop rows based on the presence of missing values in that row. For example, using the dataset above, let's assume the stop_date and stop_time columns are critical to our analysis...
PySpark 25000 1 Spark 22000 2 dtype: int64 Get Count Duplicates When having NaN Values To count duplicate values of a column which has NaN values in a DataFrame usingpivot_table()function. First, let’s see what happens when we have NaN values on a column you are checking for duplicates....
Calculate the total number of snapshots in the container frompyspark.sql.functionsimport*print("Total number of snapshots in the container:",df.where(~(col("Snapshot")).like("Null")).count()) Calculate the total container snapshots capacity (in bytes) ...
And nicely created tables in SQL and pySpark in various flavors : with pySpark writeAsTable() and SQL query with various options : USING iceberg/ STORED AS PARQUET/ STORED AS ICEBERG. I am able to query all these tables. I see them in the file system too. Nice!
In this case, the values in the sex column should only be either “male” or “female”. gdf.expect_column_values_to_be_in_set(column = 'sex', value_set=['male', 'female']){ "exception_info": { "raised_exception": false, "exception_traceback": null, "exception_message": null ...
How to Update and Drop Table Partitions Hive SHOW PARTITIONS Command HiveSHOW PARTITIONSlist all the partitions of a table in alphabetical order. Hive keeps adding new clauses to theSHOW PARTITIONS, based on the version you are using the syntax slightly changes. ...
Decorators in Python – How to enhance functions without changing the code? Generators in Python – How to lazily return values only when needed and save memory? Iterators in Python – What are Iterators and Iterables? Python Module – What are modules and packages in python? Object Oriented ...